If you really want to blow the girls' minds, buy some Synsepalum dulcificum online, a.k.a. Miracle Fruit. (You can get it in freeze-dried tablets to suck/chew). For up to about an hour afterward, sour and/or bitter things will taste sweet. The effect is most commonly demonstrated with lemons/limes, but I've heard of beer being used too.

Us

We're a family of eight traveling the world one country at a time.
Brandon's a diplomat and the rest of us (Ashley, Kathleen, Sophia, Edwin and Joseph, Eleanor, and William) are just keeping him company.